Springheart Nantuko + Mutable Explorer + Lotus Cobra + Elspeth, Storm Slayer

Springheart Nantuko

Mutable Explorer

Lotus Cobra

Elspeth, Storm Slayer

How it works

1. Play a land.
2. When the land enters, Springheart Nantuko triggers, causing you to pay 1 to create two token copies of Mutable Explorer.
3. When the Mutable Explorer tokens enter, they trigger.
4. Resolve the first Mutable Explorer trigger, creating two Mutavault land tokens that enters tapped.
5. When the Mutavault tokens enter, Springheart Nantuko and Lotus Cobra each trigger twice.
6. Resolve the Lotus Cobra triggers, adding 1.
7. Resolve the Springheart Nantuko trigger, causing you to pay 1 to create two token copies of Mutable Explorer.
8. Repeat from step 3.

This enchanting loop is supercharged by Elspeth, Storm Slayer, whose replacement effect doubles every single token created along the way. When you drop a land, Springheart Nantuko lets you pay into its landfall ability to copy Mutable Explorer—which itself has changeling and triggers to flood the board with Mutavault tokens. Those new land tokens immediately fuel Lotus Cobra for extra mana while continuously triggering Springheart Nantuko anew. The result is a magnificent cascading engine that snowballs into infinite landfall triggers, infinite colorless mana, and an overwhelming tide of creature and land tokens.